Sand-molding machine



(No Model.) Sheets-Sheet 1.

P. GALLAS. SAND MOLDING MAGHNE.

No. 356,872. Patented Feb. l, l88'7.

(No Model.) 7 sheets-sheet 2.

l. GALLAS.

SAND MOLDING MACHINE.

No. 356,872. Patented. Feb. l. 1887.

IIL

N. persas. mmm-,Mmmm wafnmgm n.;

(No Model.) 7 Sheets-Sheet 3.

P. GALLAS.

SAND MOLDING MAUHINE.

10,356,872 Patented Feb.1,1887.

fw( S/% 'WIT/VESSES :v

(No Model.) 7 Sheets-Sheet. 4.

P. GALLAS.

SAND MOLDING MAGHXNE.

Patented Feb. l, 1887.

' a@ BY ATTORNEYS.

N. PETERS. rnacmmgmw. wzshmgm, a c.

{No Model.)

Sheets-Sheet 5. P. GALLAS.

SAND MOLDING MACHINE.

No. 356,872. Patented Feb. l, 1887.

WITNESS ES'. INVENTB u. PETERS, Phnwuumgnnu, washing@ D. c.

(No Model.) 7 SheetsSheet 6.

P. GALLAS.

SAND MULDING MA@EINE.

No. 858,872. Paten-888 Peb. 1,1887;

N. PETERS. Plwto-mmgmphnn wauw-ifm. au.

(No Model.) 7 Sheets-Sheet 7.

P. GALLAS.

SAND MDLDING MACHINE.

Paterited Feb. l, 1887.

No. 356,872l` INVENTUR I wfmassfs f N, Hiram, Pnmmnugmpnay, wnnmgsm u. a

lUrTTTnn STnTns PATnNT @Tric H D PETER GALLAS, OF LANCASTER, PENNSYLVANIA.

SANDMOLDING MACE-HNE.

SPECIFICATION forming part of Letters Patent No. 356,872, dated February l, 1887.

Application iiled Angust- 7, 1885. Serial. No. 173,822. (No model.)

To LEZ whom it iii-tty concern:

Be it known that l, PETER GALLAs, of Lan.- caster, in the county of Lancaster and State of Pennsylvania, haveinvented certain new and useful improvements in Molding-Machines, of whichthe following is a speciiication.

This invention relates to an improved molding-machine; and it consists of a verticallymovable press-table and mechanism for lifting the same, said mechanism consisting; of conical drums, chains Windingon said drums, and transmitting-gearing for imparting rotary motion in opposite direction to said drums. On the press-table is supported a laterally-movable carriage that carries the pattern-plate and pattern-box, seid pattern-plate being inclosed by an adjustable frame that is turned by a suitable gear-Wheel mechanism operated by a handcrank. Above the. pattern-bor is arranged the laterally-movable press-freine and press-cover with press-blocks and a box for the moldingsand. The press-cover is supported on wheels and guided on Ways of fixed brackets of the supporting-pillars of the machine.

The invention consistsfurther, of certain details of construction and combination of parts, which will be more fully described hereinafter, and dually pointed out in the claims.-

In the accompanying drawings, Figure 1 represents a vertical longitudinal section of my improved molding-machine. Fig. 2 is a front elevation, and Fig. 3 is a side elevation, taken from the right of the apparatus. Fig. 4: is a detail Vertical transverse section, showing the connection of the pattern-box, pattern` plate, and frame of the turning mechanism. Fig. 5 is a plan of the mechanism for lifting the press-table. Pig. 6 is the horizontal section of the adjustable frame for turning the pattern-box and pattern-plate. Fig. 7 is an enlarged detail cross-sectional View ofthe sandbox, press-cover, and banking-frame. Fig. 8 is a plan View of the sand-box. Fig. 9 is an enlarged detail side View of the gearing for re- Volving the frame in which the patterns are held. Fig. 10 is an end view of the carriage. Fig. 1l is a longitudinal sectional View of the saine. Fig. 12 is a cross-sectional View of the pattern-box and a pattern in the same. Fig. .13 is a horizontal sectional View of the same,

and Fig. 1i is a cross-sectional View of the same.

Similar letters of reference indicate correspending parts.

Referring to the drawings, A represents the mechanism by which the presstable R is moved; B, the carriage hnving a verticallyrnovable plate, B2, for loosening the patterns; C', the vertically-adjustable freine for turning the pattern-box and pattern-plate; D, the banking-frame; E, the movable press-cover; e, the box for the molding-sand, and E2 the supports of the guide-frame.

The sand-box e (shown in Figs. 'i and 8) has three side Walls, one open side, and a closed bottom.

The entire molding-machine is supported on a rectangular bed-frame, L, of suitable crosssection, that is open at the center, and which supports at the corners four upright Wroughtiron main pillars, M and M, which are connected at their upper ends by suitable braces. The pressing of the patterns is effected bythe press-plate R and the lifting apparatus A, which latter is operated by a crank, p, that imparts motion by a gear-wheel transmissionchain, p3, and sprocket-Wheels pi and m to four spirally-groovcd conical drums, r r fr2 r3, which are supported in bearings of the bedi'raine L. On the shaft of the sprocket-wheel m is arranged apinion, o, which meshes with a gear-wheel, o', on the shaft of the conical drums r r. The pinion o also meshes With a second pinion, o, arranged sidewise of the former, which pinion o2 meshes with a gear- Wheel, o3, of the same size as the gear-Wheel o. The gear-Wheel o: is keyed to the shaft of the conical drums fr ri, as will be readily seen by Iiigsf?.V and 5.

By the chain and sprocket-Wheel transmission described the cone-drums -r r r2 T5 are turned in opposite direction to each other. To the cone-drums are attached chains l Z,

which pass over pulleys l Z at the lower endsy of transversely-connected auxiliary pillars B', and then to tixed rings l2 of the bed-traine L. The auxiliary pillars R are rigidly attached et their upper ends to the presstable R, so as to lift the saine and thereby the carriage B.

The use of the spirally-grooved cone-drums has the advantage that at the beginning of the lifting motion the chains are wound around. the ends of the drums having the largest diameter, so as to exert, when winding up on the larger ends, a comparatively small pressure, but a quick lifting action. This is gradually reversed as the chains are woundup on the smaller ends of the drums, whereby, at the same speed of rotation, great pressure connected with small lifting action is produced. The peculiarity of this lifting mechanism is that by a uniform turning of the crank p the press-table is lifted rapidly at the commencement of its motion, while at the termination of its upward motion the lifting motion is slackened and the patterns exposed to in` creased pressure, according to the nature of the sand to be pressed, so that with but a few rotations of the crank and small expenditure of force the lifting mechanism produces a quick lifting motion and great pressure. The presstable R is steadily guided in its vertical niotion by rollers s e, which move along the main pillars M M. The press-table R is provided with sidewise-extending brackets j, having an outer stop-liange,j, which brackets form an extended way on which the carriage B can be pushed out of the way when it is desired to turn the pattern-plate.

The carriage B is provided with axle-boxes B at the lower part and a vertically-movable plate, B2, thatis supported on powerful springs fr, of which one is arranged at each end of the carriage B. Said springs m are formed of a number of leaves in the nature of carriagesprings, which springs carry the plate B2 on their four ends, as shown in detail in Figs. 10 and 11. The plate B2 has a guide-pin, d, at each corner, which pins are passed vertically through the frame of the carriage B, and provided at their lower ends with nuts andjamnuts d', for checking and limiting the upward movement of the plate B.

The patterns a ct are inclosed bythe flask a', which is locked to the pattern-plate Cby sliding bolts' or latches b b, as shown in Figs. 12, 13, and 14, which bolts are held in place so that they can only slide in the direction of their length by clips b passed through the slots or latches of said bolts. On the patternbox a the banking-frame D rests, which serves to lill in the molding-sandy. The bankingframe D is made equal to the inner size of the patterubox and constructed of wrought-iron plates. lt serves to guide the press-blocksf f', upon which is placed the press-cover E, that is made of a strong frame of castiron, to which are screwed strong wooden planks, to willi/ch latter are screwed the press-blocks The pattern-plate C is surrounded and supported by an adjustable ftame, C. (Shown in detail in Fig. 6.) The frame G is provided with the clamping-screws q, for being firmly attached to the pattern-plate C. The frame C can be readily adjusted to agreater orsmaller Size, as it is made of four corner-pieces and fourside pieces connected by the above-mentioned clamping-screws q, so that the frame C can be used for smaller or larger patternplates.

In case the article to be molded is not too large for the machine, two half-flasks are attached to the same side of the pattern-plate; but when the pieces are too large two machines are used, and one iiask is used in each machine. Y

The pattern-frame C is supported by center pivots, q', in bearings of plates connecting the sleeves G2, which latter are guided on the pillars M M', as shown in Figs. 1, 4, and 9. The pivot g at the left-hand side of the frame C is made longer than the pivot q at the righthand side of the frame C', soas to permit the inward shifting of the lefthand part of the .frame C'. To the right-hand pivot g is keyed a iianged interiorlytoothed gear-wheel, i, meshing with a pinion, i', on a crank-shaft, w, that turns in bearings of the sleeve C2. A pawl, k, provided vwith the handle, k, is pivoted to the sleeve G2 and locks .into circumferential recesses i2 of the flanged gear-wheel t', as shown in Figs. 3 and 9. By turning the crank-shaft w the pattern-plate G, frame C', and pattern-box a are turned, which has the advantage that the patterns are accessible,and also that objects with laterally-projecting portions can be formed, which is the special advantage of my machine.

lln Figs. l2, 13, and 141 have shown the method of molding an iron pot. The moldsp for the handles are pivoted on hinged plates IOO u, the latter being fastened by screws to the Y pattern-plateRi. On theleft-hand side of Fig. 13 the handle-patterns are in the position they have during the process of forming or pressing, and on the right-hand side the handles are adjusted toward the interior, so that the outer side of the presser is entirely free and the mold can be removed from the same without any difculty. The press-cover E is provided with beveled side rails, E', which are guided along correspondiugly-shaped rails e of the supporter?. The press cover is supported by four wheels, 6"', which are guided on the rails e', so that it can be moved sidewise on the same. The rails e are extended sidewise to give sufficient space for moving the press-cover and banking frame entirely out of the way. In this position they are supported on an extension of the supporingframe, which is provided with vertically-adjustable hangerbars, as shown (but not lettered) in Fig. 4.

The operation of molding one half of the mold is effected in the following manner: rlhe carriage B is placed on the brackets j j, and the press-cover E and sand-box e. moved sidewise on the rails e', so as to clear the space above the pattern-plate C. One half of the liask a is put on the pattern-plate G and fastcned to it by means ot' the bolt-clips b Z). The

patterns are then placed in position on the pattern-plate C. The banking-frame D is then placed on the pattern-box a and enough mold- I'IOy ing-sand sifted upon the patterns until they are covered. Then by means of a suitable shovel an additional quantity of sand is taken from the open end of the sand-box e, so as to fill evenly thepattern-box and bankingframe. The press-cover E, with the pressblocks f', is now moved on the rails e into aposition vertically above the pattern-box. The carriage B, which has been at rest on the bracketsj, is next moved below the pattern-plate C. The lifting mechanism A is then set in motion, so that the press-table R is lifted with the carriage B, together with the turning-frame C', pattern plate C, and flask a', and pressed against the press-cover E, whereby the pressing of the mold is effected. The press-table R is then again lowered as much asis required to allow the turning apparatus to return to its restingplace, upon which the carriage B becomes free. The carriage B is then moved forward on the brackets j, and the press cover E, with the press-bloeksf, and bnnkingframe D, moved sidewise out of the way. The sand remaining above the level of the patternbox a is removed or trimmed off and the surface smoothed. The handle aof the pawl k is then lilted by one hand until thepawl It is released from the recess o1' notch i2 of the turning apparatus, while the other hand turns the crankshaft to, and thereby the pattern-plate C, frame G', and the flask a', far enough until the pawl t: drops in the corresponding recess or notch iz at the opposite side of the gear-wheel z, whereby the patternhox is suspended in inverted posi tion from the pattern-plate. The carriage B is then moved again below the pattern-box and lifted high enough to support the same. The bolts b b, which fasten the pattern-box to the pattern plate, are then pulled. Then by means of gentle raps on the back side of the patternplate, and by very slowly letting down the press-table, the adhesion of the mold and pat tei-ns is broken, after which the pattern-box islet down quickly, so thatl patterns are entirely liberated from the mold. The carriage B is then pulled ont again, together with one half of the flask, in which perfectly-tinished mold is obtained. The pattern-plate is then turned back again into its former position by the crank-shaft, and the next mold made in the saine manner, and so on. The other half of the mold, or the upper part of the box, is molded in the manner described on asecond machine, with only this exception, that the pouring-gate and raisers must be molded in the upper part, so that two half-boxes belonging to each other are finished simultaneously. These two half-boxes are then transferred to a suitable automatic box-adjusting apparatus, and closed preparatory to casting.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In a molding-machine, the combination of a supporting bedframe, upright pillars, auxiliary pillars, a press-table supported on the auxiliary pillars, spirallygrooved conedrums, supporting chains passing from the drums below the auxiliary pillars to the bedframe, and motion-transmitting mechanism by which the cone-drums are turned and the presstable raised or lowered, substantially as set forth.

2. In a molding-machine, the combination of the bed-frame L, upright pillars M M', auX- iliary pillars it R', a press-table, R, having guide-rollers s s, chains ZZ, conical drums fr 'r'r r3, transmitting gear-wheels o o' o2 o3, sprocketwheels m 92, chain 93 and crankshaft w substantially as set forth.

3. ln a molding-machine, the combination of a patternplate, a pivoted and longitudinally-adjustable palternplate frame,e a flask,

mechanism for attaching the ilask to the pat- I tern-plate, and gearing for turning the patternplate on its axis, substantially as set forth.

4. In a molding-machine, an open patternplate frame formed of corner-pieces, adjustable side pieces, clamping-screws, and central pivots attached to end pieces, substantiall y as set forth.

5. In a moldingmachine, the combination of a pat-template, C, a flask, a, and sliding bolt-clips b b, for fastening the pattern-box to the pattern-plate, substantially7 as set forth.

ln testimony that l claim the foregoing as my invention l have signed my naine in presence of two subscribing witnesses.

PETER GAL-LAS.

llitn esses B. F. Gnorr, A. S. GUINEY. 

